Drop obsolete members after release v0.14.1

Author: nulltoken

LibGit2Sharp/LibGit2Sharp.csproj

@@ -107,7 +107,6 @@
     <Compile Include="Core\GitRemoteHead.cs" />
     <Compile Include="ReflogEntry.cs" />
     <Compile Include="Stash.cs" />
-    <Compile Include="OrphanedHeadException.cs" />
     <Compile Include="StashCollection.cs" />
     <Compile Include="ExplicitPathsOptions.cs" />
     <Compile Include="Submodule.cs" />

LibGit2Sharp/OrphanedHeadException.cs

@@ -60,16 +60,6 @@ public virtual bool IsHeadDetached
             get { return Proxy.git_repository_head_detached(repo.Handle); }
         }
 
-        /// <summary>
-        /// Indicates whether the Head points to a reference which doesn't exist.
-        /// </summary>
-        [Obsolete("This property will be removed in the next release. Please use IsHeadUnborn instead.")]
-        public virtual bool IsHeadOrphaned
-        {
-            get { return IsHeadUnborn; }
-        }
-
-
         /// <summary>
         /// Indicates whether the Head points to a reference which doesn't exist.
         /// </summary>