dispatch: remove Python 2 function variants

Differential Revision: https://phab.mercurial-scm.org/D12294

mercurial/dispatch.py

@@ -149,8 +149,6 b' def run():'
     sys.exit(status & 255)
 
 
-if pycompat.ispy3:
-
     def initstdio():
         # stdio streams on Python 3 are io.TextIOWrapper instances proxying another
         # buffer. These streams will normalize \n to \r\n by default. Mercurial's
@@ -177,10 +175,7 b' if pycompat.ispy3:'
                 kwargs["write_through"] = sys.stdout.write_through
                 # pytype: enable=attribute-error
             sys.stdout = io.TextIOWrapper(
-                sys.stdout.buffer,
-                sys.stdout.encoding,
-                sys.stdout.errors,
-                **kwargs
+            sys.stdout.buffer, sys.stdout.encoding, sys.stdout.errors, **kwargs
             )
 
         if sys.stderr is not None:
@@ -193,10 +188,7 b' if pycompat.ispy3:'
                 kwargs["write_through"] = sys.stderr.write_through
                 # pytype: enable=attribute-error
             sys.stderr = io.TextIOWrapper(
-                sys.stderr.buffer,
-                sys.stderr.encoding,
-                sys.stderr.errors,
-                **kwargs
+            sys.stderr.buffer, sys.stderr.encoding, sys.stderr.errors, **kwargs
             )
 
         if sys.stdin is not None:
@@ -210,6 +202,7 b' if pycompat.ispy3:'
                 line_buffering=sys.stdin.line_buffering,
             )
 
+
     def _silencestdio():
         for fp in (sys.stdout, sys.stderr):
             if fp is None:
@@ -228,16 +221,6 b' if pycompat.ispy3:'
                 pass
 
 
-else:
-
-    def initstdio():
-        for fp in (sys.stdin, sys.stdout, sys.stderr):
-            procutil.setbinary(fp)
-
-    def _silencestdio():
-        pass
-
-
 def _formatargs(args):
     return b' '.join(procutil.shellquote(a) for a in args)