dpcs: rm some instances of "sudo pip" recommendations

we should not recommend users to invoke pip with sudo

contrib/deterministic-build/find_restricted_dependencies.py

@@ -4,7 +4,7 @@ import sys
 try:
     import requests
 except ImportError as e:
-    sys.exit(f"Error: {str(e)}. Try 'sudo python3 -m pip install <module-name>'")
+    sys.exit(f"Error: {str(e)}. Try 'python3 -m pip install <module-name>'")
 
 def is_dependency_edge_blacklisted(*, parent_pkg: str, dep: str) -> bool:
     """Sometimes a package declares a hard dependency

electrum/gui/qml/qeapp.py

@@ -171,7 +171,7 @@ class QEAppController(BaseCrashReporter, QObject):
             )
             notification.notify('Electrum', message, app_icon=icon, app_name='Electrum')
         except ImportError:
-            self.logger.warning('Notification: needs plyer; `sudo python3 -m pip install plyer`')
+            self.logger.warning('Notification: needs plyer; `python3 -m pip install plyer`')
         except Exception as e:
             self.logger.error(repr(e))