More cleanup, remove useless attribute "orientation"

vector/src/main/res/layout/fragment_devtool_keyrequests.xml

@@ -4,7 +4,6 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:orientation="vertical"
     tools:background="#FFFFFF">
 
     <com.google.android.material.tabs.TabLayout

vector/src/main/res/layout/fragment_login_generic_text_input_form.xml

@@ -65,8 +65,7 @@
             <RelativeLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginTop="8dp"
-                android:orientation="horizontal">
+                android:layout_marginTop="8dp">
 
                 <Button
                     android:id="@+id/loginGenericTextInputFormOtherButton"

vector/src/main/res/layout/fragment_room_widget.xml

@@ -2,8 +2,7 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical">
+    android:layout_height="match_parent">
 
     <WebView
         android:id="@+id/widgetWebView"

vector/src/main/res/layout/item_create_direct_room_user.xml

@@ -9,7 +9,6 @@
     android:background="?android:colorBackground"
     android:foreground="?attr/selectableItemBackground"
     android:gravity="center_vertical"
-    android:orientation="horizontal"
     android:padding="8dp">
 
     <FrameLayout

vector/src/main/res/layout/item_invite_by_mail.xml

@@ -7,7 +7,6 @@
     android:background="?android:colorBackground"
     android:foreground="?attr/selectableItemBackground"
     android:gravity="center_vertical"
-    android:orientation="horizontal"
     android:padding="8dp">
 
     <FrameLayout

vector/src/main/res/layout/item_room_widget.xml

@@ -7,7 +7,6 @@
     android:background="?attr/selectableItemBackground"
     android:gravity="center_vertical"
     android:minHeight="64dp"
-    android:orientation="horizontal"
     android:paddingStart="@dimen/layout_horizontal_margin"
     android:paddingEnd="@dimen/layout_horizontal_margin">
 

vector/src/main/res/layout/item_settings_simple_item.xml

@@ -32,7 +32,6 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginBottom="4dp"
-            android:orientation="vertical"
             android:textColor="?vctr_content_secondary"
             tools:text="Description / Value" />
     </LinearLayout>