Update FeatureSwitchDefinitionAttribute.xml

Author: MichalStrehovsky

xml/System.Diagnostics.CodeAnalysis/FeatureSwitchDefinitionAttribute.xml

@@ -31,8 +31,7 @@
         corresponds to the feature switch specified by name.</para>
     </summary>
     <remarks>
-      <para>
-          <format type="text/markdown"><![CDATA[
+      <format type="text/markdown"><![CDATA[
 IL rewriters and compilers can use this attribute to substitute the return value of the specified property with the value of the feature switch.
 
 The value of the feature switch can only be specified at the application level and affects the entire application. It is possible to get into situations where one library that is part of the application requires the feature switch to be turned on, but has no way to communicate this to the application author.