MOBILE-3947 chore: Remove old ionic migration

.github/workflows/migration.yml

@@ -1,18 +0,0 @@
-name: Migration checks
-
-on: workflow_dispatch
-
-jobs:
-  checks:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-node@v3
-      with:
-        node-version-file: '.nvmrc'
-    - run: npm ci --no-audit
-    - run: result=$(find src -type f -iname '*.html' -exec sh -c 'cat {} | tr "\n" " " | grep -Eo "class=\"[^\"]+\"[^>]+class=\"" ' \; | wc -l); test $result -eq 0
-    - run: npm install -D @ionic/v4-migration-tslint
-    - run: npx tslint -c ionic-migration.json -p tsconfig.json

ionic-migration.json

@@ -1,43 +0,0 @@
-{
-  "rulesDirectory": ["@ionic/v4-migration-tslint/rules"],
-  "rules": {
-    "ion-action-sheet-method-create-parameters-renamed": true,
-    "ion-alert-method-create-parameters-renamed": true,
-    "ion-back-button-not-added-by-default": { "options": [true], "severity": "warning" },
-    "ion-button-attributes-renamed": true,
-    "ion-button-is-now-an-element": true,
-    "ion-buttons-attributes-renamed": true,
-    "ion-col-attributes-renamed": true,
-    "ion-datetime-capitalization-changed": true,
-    "ion-fab-attributes-renamed": true,
-    "ion-fab-button-is-now-an-element": true,
-    "ion-fab-fixed-content": true,
-    "ion-icon-attribute-is-active-removed": true,
-    "ion-item-attributes-renamed": true,
-    "ion-item-divider-ion-label-required": true,
-    "ion-item-ion-label-required": true,
-    "ion-item-is-now-an-element": true,
-    "ion-item-option-is-now-an-element": true,
-    "ion-item-option-method-get-sliding-percent-renamed": true,
-    "ion-item-options-attribute-values-renamed": true,
-    "ion-label-attributes-renamed": true,
-    "ion-list-header-ion-label-required": true,
-    "ion-loading-method-create-parameters-renamed": true,
-    "ion-menu-events-renamed": true,
-    "ion-menu-toggle-is-now-an-element": true,
-    "ion-navbar-is-now-ion-toolbar": true,
-    "ion-option-is-now-ion-select-option": true,
-    "ion-overlay-method-create-should-use-await": true,
-    "ion-overlay-method-present-should-use-await": { "options": [true], "severity": "warning" },
-    "ion-radio-attributes-renamed": true,
-    "ion-radio-group-is-now-an-element": true,
-    "ion-radio-slot-required": true,
-    "ion-range-attributes-renamed": true,
-    "ion-segment-button-ion-label-required": true,
-    "ion-spinner-attribute-values-renamed": true,
-    "ion-tabs-refactored": { "options": [true], "severity": "warning" },
-    "ion-text-is-now-an-element": true
-  }
-}
-
-