Remove file content QA selector from blob content

As per refactoring this is now duplicated with the simple viewer

app/assets/javascripts/vue_shared/components/blob_viewers/simple_viewer.vue

@@ -54,12 +54,7 @@ export default {
       :file-name="fileName"
       :editor-options="{ readOnly: true }"
     />
-    <div
-      v-else
-      class="file-content code js-syntax-highlight"
-      data-qa-selector="file_content"
-      :class="$options.userColorScheme"
-    >
+    <div v-else class="file-content code js-syntax-highlight" :class="$options.userColorScheme">
       <div class="line-numbers">
         <a
           v-for="line in lineNumbers"

qa/qa/page/component/snippet.rb

@@ -25,10 +25,6 @@ module QA
             element :file_title_content
           end
 
-          base.view 'app/assets/javascripts/vue_shared/components/blob_viewers/simple_viewer.vue' do
-            element :file_content
-          end
-
           base.view 'app/assets/javascripts/blob/components/blob_content.vue' do
             element :file_content
           end

spec/frontend/vue_shared/components/blob_viewers/__snapshots__/simple_viewer_spec.js.snap

@@ -4,7 +4,6 @@ exports[`Blob Simple Viewer component rendering matches the snapshot 1`] = `
 <div>
   <div
     class="file-content code js-syntax-highlight"
-    data-qa-selector="file_content"
   >
     <div
       class="line-numbers"