Remove obsolete substvars in debian/control

debian/control

@@ -57,7 +57,7 @@ Section: python
 Priority: optional
 Architecture: all
 Build-Profiles: <!stage1>
-Depends: ${misc:Depends}, ${shlibs:Depends}, ${python:Depends},
+Depends: ${misc:Depends}, ${python:Depends},
     libmagic1 (>= ${binary:Version}),
     libmagic1 (<< ${binary:Version}.1~),
 Provides: ${python:Provides}
@@ -76,7 +76,6 @@ Build-Profiles: <!stage1>
 Depends: ${misc:Depends}, ${python3:Depends},
     libmagic1 (>= ${binary:Version}),
     libmagic1 (<< ${binary:Version}.1~),
-Provides: ${python3:Provides}
 Description: File type determination library using "magic" numbers (Python 3 bindings)
  This library can be used to classify files according to magic
  number tests. It implements the core functionality of the file