Everywhere: Remove pessimizing and redundant move()

Userland/Libraries/LibDebug/DebugSession.cpp

@@ -120,7 +120,7 @@ OwnPtr<DebugSession> DebugSession::exec_and_attach(const String& command, String
     // At this point, libraries should have been loaded
     debug_session->update_loaded_libs();
 
-    return move(debug_session);
+    return debug_session;
 }
 
 bool DebugSession::poke(u32* address, u32 data)

Userland/Libraries/LibImageDecoderClient/Client.cpp

@@ -78,7 +78,7 @@ Optional<DecodedImage> Client::decode_image(const ByteBuffer& encoded_data)
         frame.bitmap = response->bitmaps()[i].bitmap();
         frame.duration = response->durations()[i];
     }
-    return move(image);
+    return image;
 }
 
 }

Userland/Libraries/LibMarkdown/Table.cpp

@@ -231,7 +231,7 @@ OwnPtr<Table> Table::parse(Vector<StringView>::ConstIterator& lines)
 
     table->m_row_count = row_count;
 
-    return move(table);
+    return table;
 }
 
 }