message: eager: Remove unnecessary "if in_graph_mode()" check in layers.
  VariableScope ignores the reuse argument when eager execution is enabled
  and treats it as AUTO_REUSE. So the caller doesn't have to explicitly do
  so.
diff: @@ -422,9 +422,8 @@ class Layer(object):
  dtype = self.dtype or dtypes.float32
  self._set_scope(None)
  - vs_reuse = ((self.built or self._reuse)
  - if context.in_graph_mode() else vs.AUTO_REUSE)
  - with vs.variable_scope(self._scope, reuse=vs_reuse) as scope:
  + with vs.variable_scope(
  + self._scope, reuse=(self.built or self._reuse)) as scope:
  with ops.name_scope(scope.original_name_scope):
  variable = vs.get_variable(name,
  shape=shape,
  @@ -508,9 +507,8 @@ class Layer(object):
  # to __call__, hence we set previous_mask as the default value.
  kwargs['mask'] = previous_mask
  - vs_reuse = ((self.built or self._reuse)
  - if context.in_graph_mode else vs.AUTO_REUSE)
  - with vs.variable_scope(self._scope, reuse=vs_reuse) as scope:
  + with vs.variable_scope(
  + self._scope, reuse=(self.built or self._reuse)) as scope:
  with ops.name_scope(scope.original_name_scope):
  if not self.built:
  if not in_graph_mode:
  