Remove label property for barriers and snapshots and increase mpl lab…

…el font size

qiskit/circuit/barrier.py

@@ -38,26 +38,6 @@ def __init__(self, num_qubits, label=None):
         self._label = label
         super().__init__("barrier", num_qubits, 0, [], label=label)
 
-    @property
-    def label(self):
-        """Return barrier label"""
-        return self._label
-
-    @label.setter
-    def label(self, name):
-        """Set barrier label to name
-
-        Args:
-            name (str or None): label to assign barrier
-
-        Raises:
-            TypeError: name is not string or None.
-        """
-        if isinstance(name, str):
-            self._label = name
-        else:
-            raise TypeError("label expects a string")
-
     def inverse(self):
         """Special case. Return self."""
         return Barrier(self.num_qubits)

qiskit/extensions/simulator/snapshot.py

@@ -60,26 +60,6 @@ def snapshot_type(self):
         """Return snapshot type"""
         return self._snapshot_type
 
-    @property
-    def label(self):
-        """Return snapshot label"""
-        return self._label
-
-    @label.setter
-    def label(self, name):
-        """Set snapshot label to name
-
-        Args:
-            name (str or None): label to assign unitary
-
-        Raises:
-            TypeError: name is not string or None.
-        """
-        if isinstance(name, str):
-            self._label = name
-        else:
-            raise TypeError("label expects a string")
-
     def c_if(self, classical, val):
         raise QiskitError("Snapshots are simulator directives and cannot be conditional.")
 

qiskit/visualization/matplotlib.py

@@ -1051,7 +1051,7 @@ def _barrier(self, node):
                     node.op.label,
                     ha="center",
                     va="top",
-                    fontsize=self._sfs,
+                    fontsize=self._fs,
                     color=self._data[node]["tc"],
                     clip_on=True,
                     zorder=PORDER_TEXT,