Fix CDATA format in BitVector32+Section.xml (#4237)

* Fix CDATA format in BitVector32+Section.xml

* remove duplicated member

Author: TianqiZhang

xml/System.Collections.Specialized/BitVector32+Section.xml

@@ -390,43 +390,7 @@
         <returns>
           <see langword="true" /> if the <paramref name="a" /> and <paramref name="b" /> parameters represent different <see cref="T:System.Collections.Specialized.BitVector32.Section" /> objects; otherwise, <see langword="false" />.</returns>
         <remarks>
-          <format type="text/markdown"><![CDATA[The equivalent method for this operator is <xref:System.Collections.Specialized.BitVector32.Section.op_Equality*></format>
-        </remarks>
-      </Docs>
-    </Member>
-    <Member MemberName="ToString">
-      <MemberSignature Language="C#" Value="public override string ToString ();" />
-      <MemberSignature Language="ILAsm" Value=".method public hidebysig virtual instance string ToString() cil managed" />
-      <MemberSignature Language="DocId" Value="M:System.Collections.Specialized.BitVector32.Section.ToString" />
-      <MemberType>Method</MemberType>
-      <AssemblyInfo>
-        <AssemblyName>System.Collections.Specialized</AssemblyName>
-        <AssemblyVersion>4.0.1.0</AssemblyVersion>
-        <AssemblyVersion>4.1.0.0</AssemblyVersion>
-      </AssemblyInfo>
-      <AssemblyInfo>
-        <AssemblyName>System</AssemblyName>
-        <AssemblyVersion>2.0.5.0</AssemblyVersion>
-        <AssemblyVersion>4.0.0.0</AssemblyVersion>
-      </AssemblyInfo>
-      <AssemblyInfo>
-        <AssemblyName>netstandard</AssemblyName>
-        <AssemblyVersion>2.0.0.0</AssemblyVersion>
-      </AssemblyInfo>
-      <ReturnValue>
-        <ReturnType>System.String</ReturnType>
-      </ReturnValue>
-      <Parameters />
-      <Docs>
-        <summary>Returns a string that represents the current <see cref="T:System.Collections.Specialized.BitVector32.Section" />.</summary>
-        <returns>A string that represents the current <see cref="T:System.Collections.Specialized.BitVector32.Section" />.</returns>
-        <remarks>
-          <format type="text/markdown"><![CDATA[  
-  
-## Remarks  
- This method overrides <xref:System.Object.ToString%2A?displayProperty=nameWithType>.  
-  
- ]]></format>
+          <format type="text/markdown"><![CDATA[The equivalent method for this operator is <xref:System.Collections.Specialized.BitVector32.Section.op_Equality*>]]></format>
         </remarks>
       </Docs>
     </Member>