Refactor: remove unused table mixin and update header alignment styles

apps/client/src/styles/table.scss

@@ -9,6 +9,12 @@
     }
   }
 
+  th {
+    .mat-sort-header-container {
+      justify-content: inherit;
+    }
+  }
+
   .mat-mdc-footer-row {
     .mat-mdc-footer-cell {
       border-top: 1px solid

libs/ui/src/lib/accounts-table/accounts-table.component.scss

@@ -1,7 +1,3 @@
-@import '../mixins/table-mixins';
-
 :host {
   display: block;
-
-  @include gf-table-header-alignment();
 }

libs/ui/src/lib/activities-table/activities-table.component.scss

@@ -1,7 +1,3 @@
-@import '../mixins/table-mixins';
-
 :host {
   display: block;
-
-  @include gf-table-header-alignment();
 }

libs/ui/src/lib/benchmark/benchmark.component.scss

@@ -1,7 +1,3 @@
-@import '../mixins/table-mixins';
-
 :host {
   display: block;
-
-  @include gf-table-header-alignment();
 }

libs/ui/src/lib/holdings-table/holdings-table.component.scss

@@ -1,7 +1,3 @@
-@import '../mixins/table-mixins';
-
 :host {
   display: block;
-
-  @include gf-table-header-alignment();
 }

libs/ui/src/lib/mixins/table-mixins.scss

@@ -1,11 +0,0 @@
-@mixin gf-table-header-alignment() {
-  .gf-table {
-    th {
-      ::ng-deep {
-        .mat-sort-header-container {
-          justify-content: inherit;
-        }
-      }
-    }
-  }
-}