Remove some dead code flagged by a reader's comment

Author: lpozo

python-contact-book/source_code_final/rpcontacts/views.py

@@ -149,7 +149,4 @@ def accept(self):
 
             self.data.append(field.text())
 
-        if not self.data:
-            return
-
         super().accept()

python-contact-book/source_code_step_5/rpcontacts/views.py

@@ -119,7 +119,4 @@ def accept(self):
 
             self.data.append(field.text())
 
-        if not self.data:
-            return
-
         super().accept()

python-contact-book/source_code_step_6/rpcontacts/views.py

@@ -149,7 +149,4 @@ def accept(self):
 
             self.data.append(field.text())
 
-        if not self.data:
-            return
-
         super().accept()