DevTools: get rid of deviceMetics settings.

Source/devtools/front_end/overrides.css

Index: Source/devtools/front_end/overrides.css
diff --git a/Source/devtools/front_end/overrides.css b/Source/devtools/front_end/overrides.css
index 684cbbaeeb475b499ea6f1b488b32c8d950a1597..8172dc3febf9f9000c25cd0cb4c0830583e6ba17 100644
--- a/Source/devtools/front_end/overrides.css
+++ b/Source/devtools/front_end/overrides.css
@@ -84,6 +84,21 @@
     padding: 0 0 5px 15px;
 }
 
+.overrides-view fieldset p {
+    display: inline-block;
+    padding: 0;
+    margin: 0;
+    border: 0;
+}
+
+.overrides-view fieldset p label {
+    display: inline-block;
+}
+
+.overrides-view .field-error-message {
+    display: none;
+}
+
 .overrides-user-agent fieldset {
     padding-top: 5px;
 }