Remove all proposal-related code

We're not using proposals at the moment, so it's just in the way.

app/components/add-proposal/component.js

@@ -1,64 +0,0 @@
-import Component from '@ember/component';
-import { computed } from '@ember/object';
-import { and, notEmpty } from '@ember/object/computed';
-
-export default Component.extend({
-
-  attributes: null,
-  contributors: Object.freeze([]),
-
-  isValidContributor: notEmpty('contributorId'),
-  isValidAmount: computed('amount', function() {
-    return parseInt(this.amount, 10) > 0;
-  }),
-  isValidDescription: notEmpty('description'),
-  isValidUrl: notEmpty('url'),
-  isValid: and('isValidContributor',
-               'isValidAmount',
-               'isValidDescription'),
-
-  init () {
-    this._super(...arguments);
-
-    // Default attributes used by reset
-    this.set('attributes', {
-      contributorId: null,
-      kind: 'community',
-      amount: null,
-      description: null,
-      url: null,
-    });
-  },
-
-  didInsertElement() {
-    this._super(...arguments);
-    this.reset();
-  },
-
-  reset: function() {
-    this.setProperties(this.attributes);
-  },
-
-  actions: {
-    submit() {
-      if (!this.isValid) {
-        alert('Invalid data. Please review and try again.');
-        return;
-      }
-
-      let attributes = Object.keys(this.attributes);
-      let proposal = this.getProperties(attributes);
-      let saved = this.save(proposal);
-
-      // The promise handles inProgress
-      this.set('inProgress', saved);
-
-      saved.then(() => {
-        this.reset();
-        window.scroll(0,0);
-        window.alert('Proposal added.');
-      });
-    }
-  }
-
-});

app/components/add-proposal/template.hbs

@@ -1,44 +0,0 @@
-<form {{action "submit" on="submit"}}>
-  <p>
-    <select required onchange={{action (mut contributorId) value="target.value"}}>
-      <option value="" selected disabled hidden>Contributor</option>
-      {{#each contributors as |contributor|}}
-        <option value={{contributor.id}} selected={{eq contributorId contributor.id}}>{{contributor.github_username}}</option>
-      {{/each}}
-    </select>
-  </p>
-  <p>
-    <select required onchange={{action (mut kind) value="target.value"}}>
-      <option value="community" selected={{eq kind "community"}}>Community</option>
-      <option value="design" selected={{eq kind "design"}}>Design</option>
-      <option value="dev" selected={{eq kind "dev"}}>Development</option>
-      <option value="docs" selected={{eq kind "docs"}}>Documentation</option>
-      <option value="ops" selected={{eq kind "ops"}}>IT Operations</option>
-    </select>
-  </p>
-  <p>
-    {{input type="text"
-            placeholder="100"
-            value=amount
-            class=(if isValidAmount "valid" "")}}
-  </p>
-  <p>
-    {{input type="text"
-            placeholder="Description"
-            value=description
-            class=(if isValidDescription "valid" "")}}
-  </p>
-  <p>
-    {{input type="text"
-            placeholder="URL (optional)"
-            value=url
-            class=(if isValidUrl "valid" "")}}
-  </p>
-  <p class="actions">
-    {{input type="submit"
-            disabled=(is-pending inProgress)
-            value=(if (is-pending inProgress) "Processing" "Save")}}
-    {{#link-to "index"}}Back{{/link-to}}
-  </p>
-</form>
-

app/components/proposal-list/component.js

@@ -1,20 +0,0 @@
-import Component from '@ember/component';
-
-export default Component.extend({
-
-  tagName: 'ul',
-  classNames: ['proposal-list'],
-
-  actions: {
-
-    confirm(proposalId) {
-      if (this.contractInteractionEnabled) {
-        this.confirmProposal(proposalId);
-      } else {
-        window.alert('Only members can vote on proposals. Please ask someone to set you up.');
-      }
-    }
-
-  }
-
-});

app/components/proposal-list/template.hbs

@@ -1,20 +0,0 @@
-{{#each proposals as |proposal|}}
-  <li data-proposal-id={{proposal.id}} class={{if proposal.isExecuted "confirmed" "unconfirmed"}}>
-    <p class="meta">
-      <span class="category {{proposal.kind}}">♥ ({{proposal.kind}})</span>
-      <span class="recipient">{{proposal.contributor.name}}:</span>
-    </p>
-    <p class="kredits-amount">
-      <span class="amount">{{proposal.amount}}</span><span class="symbol">₭S</span>
-    </p>
-    <p class="description">
-      <span class="description">{{proposal.description}}</span>
-    </p>
-    <p class="voting">
-      {{#unless proposal.isExecuted}}
-        <span class="votes">({{proposal.votesCount}}/{{proposal.votesNeeded}} votes)</span>
-        <button {{action "confirm" proposal.id}}>+1</button>
-      {{/unless}}
-    </p>
-  </li>
-{{/each}}