Remove init_flags and final_flags from plugin type

Removes an extension point to the Plugin type which wasn't used.

src/HpcCombine.hs

@@ -29,9 +29,7 @@ sumPlugin =
       usage = "[OPTION] .. <TIX_FILE> [<TIX_FILE> [<TIX_FILE> ..]]",
       options = sumOptions,
       summary = "Sum multiple .tix files in a single .tix file",
-      implementation = sumMain,
-      init_flags = defaultFlags,
-      final_flags = defaultFinalFlags
+      implementation = sumMain
     }
 
 combineOptions :: FlagOptSeq
@@ -51,9 +49,7 @@ combinePlugin =
       usage = "[OPTION] .. <TIX_FILE> <TIX_FILE>",
       options = combineOptions,
       summary = "Combine two .tix files in a single .tix file",
-      implementation = combineMain,
-      init_flags = defaultFlags,
-      final_flags = defaultFinalFlags
+      implementation = combineMain
     }
 
 mapOptions :: FlagOptSeq
@@ -73,9 +69,7 @@ mapPlugin =
       usage = "[OPTION] .. <TIX_FILE> ",
       options = mapOptions,
       summary = "Map a function over a single .tix file",
-      implementation = mapMain,
-      init_flags = defaultFlags,
-      final_flags = defaultFinalFlags
+      implementation = mapMain
     }
 
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