Don't force to use all processors in autobake-deb.sh

The dpkg-buildpackage has by default sensible values for --jobs and
--try-jobs, and it also inherits whatever 'parallel' is set in
DEB_BUILD_OPTIONS. Overriding it here should not be needed and removing
it is better, since it allows build systems to control the level or
parallel builds via DEB_BUILD_OPTIONS if they want, which they often do
(e.g. to avoid CPU congestion or overheating laptops).

debian/autobake-deb.sh

@@ -126,7 +126,7 @@ fi
 # Build the package
 # Pass -I so that .git and other unnecessary temporary and source control files
 # will be ignored by dpkg-source when creating the tar.gz source package.
-fakeroot dpkg-buildpackage -us -uc -I $BUILDPACKAGE_FLAGS -j$(nproc)
+fakeroot dpkg-buildpackage -us -uc -I $BUILDPACKAGE_FLAGS
 
 # If the step above fails due to missing dependencies, you can manually run
 #   sudo mk-build-deps debian/control -r -i