tirei um botao que nao serve para nada

app/src/main/java/com/example/vdcscore/MainActivity.java

@@ -50,14 +50,7 @@ public class MainActivity extends AppCompatActivity {
         setContentView(binding.getRoot());
 
         setSupportActionBar(binding.appBarMain.toolbar);
-        binding.appBarMain.fab.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
-                        .setAction("Action", null)
-                        .setAnchorView(R.id.fab).show();
-            }
-        });
+
         DrawerLayout drawer = binding.drawerLayout;
         NavigationView navigationView = binding.navView;
         // Passing each menu ID as a set of Ids because each

app/src/main/res/layout/app_bar_main.xml

@@ -24,13 +24,6 @@
 
     <include layout="@layout/content_main" />
 
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
-        android:id="@+id/fab"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_gravity="bottom|end"
-        android:layout_marginEnd="@dimen/fab_margin"
-        android:layout_marginBottom="16dp"
-        app:srcCompat="@android:drawable/ic_dialog_email" />
+
 
 </androidx.coordinatorlayout.widget.CoordinatorLayout>