Fix violations of SA1624 (PropertySummaryDocumentationMustOmitSetAccessorWithRestrictedAccess)

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers/Helpers/FileHeader.cs

@@ -49,7 +49,7 @@ internal static FileHeader MissingFileHeader
         }
 
         /// <summary>
-        /// Gets or sets a value indicating whether the file header is missing.
+        /// Gets a value indicating whether the file header is missing.
         /// </summary>
         /// <value>
         /// True if the file header is missing.

StyleCop.Analyzers/StyleCop.Analyzers/Helpers/XmlFileHeader.cs

@@ -67,15 +67,15 @@ internal static XmlFileHeader MalformedFileHeader
         }
 
         /// <summary>
-        /// Gets or sets a value indicating whether the file header is missing.
+        /// Gets a value indicating whether the file header is missing.
         /// </summary>
         /// <value>
         /// True if the file header is missing.
         /// </value>
         internal bool IsMissing { get; private set; }
 
         /// <summary>
-        /// Gets or sets a value indicating whether the file header contains a properly formatted XML structure.
+        /// Gets a value indicating whether the file header contains a properly formatted XML structure.
         /// </summary>
         /// <value>
         /// True if the file header is not properly formatted XML.