Resolve build warnings and errors

src/Lucene.Net.Analysis.Common/Analysis/NGram/NGramTokenFilter.cs

@@ -124,6 +124,10 @@ public int PositionIncrement
 
             // LUCENENET specific - The interface requires this to be implemented, since we added it to avoid casts.
             public void CopyTo(IAttribute target) => _ = target;
+
+            public void Clear()
+            {
+            }
         }
 
         private sealed class PositionLengthAttributeAnonymousClass : IPositionLengthAttribute
@@ -136,6 +140,10 @@ public int PositionLength
 
             // LUCENENET specific - The interface requires this to be implemented, since we added it to avoid casts.
             public void CopyTo(IAttribute target) => _ = target;
+
+            public void Clear()
+            {
+            }
         }
 
         /// <summary>
@@ -233,4 +241,4 @@ public override void Reset()
             curTermBuffer = null;
         }
     }
-}
+}

src/Lucene.Net.Analysis.Morfologik/Morfologik/TokenAttributes/MorphosyntacticTagsAttribute.cs

@@ -37,8 +37,5 @@ public interface IMorphosyntacticTagsAttribute : IAttribute
         /// The default value (no-value) is null. Returns a list of POS tags corresponding to current lemma.
         /// </summary>
         IList<StringBuilder> Tags { get; set; }
-
-        /// <summary>Clear to default value.</summary>
-        void Clear();
     }
 }

src/Lucene.Net/Analysis/Token.cs

@@ -65,7 +65,7 @@ namespace Lucene.Net.Analysis
     /// Failing that, to create a new <see cref="Token"/> you should first use
     /// one of the constructors that starts with null text.  To load
     /// the token from a char[] use <see cref="ICharTermAttribute.CopyBuffer(char[], int, int)"/>.
-    /// To load from a <see cref="string"/> use <see cref="ICharTermAttribute.Clear()"/> (or <see cref="CharTermAttributeExtensions.SetEmpty(ICharTermAttribute)"/>) followed by
+    /// To load from a <see cref="string"/> use <see cref="IAttribute.Clear()"/> (or <see cref="CharTermAttributeExtensions.SetEmpty(ICharTermAttribute)"/>) followed by
     /// <see cref="ICharTermAttribute.Append(string)"/> or <see cref="ICharTermAttribute.Append(string, int, int)"/>.
     /// Alternatively you can get the <see cref="Token"/>'s termBuffer by calling either <see cref="ICharTermAttribute.Buffer"/>,
     /// if you know that your text is shorter than the capacity of the termBuffer

src/Lucene.Net/Support/Analysis/TokenAttributes/Extensions/CharTermAttributeExtensions.cs

@@ -53,7 +53,7 @@ public static ICharTermAttribute SetLength(this ICharTermAttribute termAttr, int
         /// Sets the length of the termBuffer to zero.
         /// Use this method before appending contents.
         /// <para />
-        /// NOTE: This is exactly the same operation as calling <see cref="ICharTermAttribute.Clear()"/>, the primary
+        /// NOTE: This is exactly the same operation as calling <see cref="Lucene.Net.Util.IAttribute.Clear()"/>, the primary
         /// difference is that this method returns a reference to the current object so it can be chained.
         /// <code>
         /// obj.SetEmpty().Append("hey you");