Remove duplicate sentence

Author: kiranchandramohan

flang/docs/FortranStandardsSupport.md

@@ -17,9 +17,8 @@ local:
 This document summarizes Fortran standards support in Flang. The information is only provided as a guideline. The
 TODOs/Not Yet Implemented messages emitted by the compiler for unimplemented features should be treated as authoritative.
 
-The standards support information is provided as a table with three columns that are self explanatory. No distinction is
-made between the support in the Parser/Semantics and MLIR or Lowering support. The Status column uses
-the letters **P**, **Y**, **N** for the implementation status:
+The standards support information is provided as a table with three columns that are self explanatory.
+The Status column uses the letters **P**, **Y**, **N** for the implementation status:
 - **P** : When the implementation is incomplete for a few cases
 - **Y** : When the implementation is complete
 - **N** : When the implementation is absent