Drop valhall dummy libraries

These libraries depends on new glibc and libstdc++(with GCC 10.3), which
is unusable for old systems.

Let's drop them, and replace with proper ones(with GCC 4.9) later.

Change-Id: Ia723592bfd5369811a306cad1d832773cd62284e
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>

debian/control

@@ -235,22 +235,6 @@ Replaces: libmali
 Depends: ${shlibs:Depends}, ${misc:Depends}
 Description: Mali GPU User-Space Binary Drivers
 
-Package: libmali-valhall-g610-g6p0-dummy
-Architecture: arm64
-Provides: libmali
-Conflicts: libmali
-Replaces: libmali
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: Mali GPU User-Space Binary Drivers
-
-Package: libmali-valhall-g610-g6p0-dummy-gbm
-Architecture: arm64
-Provides: libmali
-Conflicts: libmali
-Replaces: libmali
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: Mali GPU User-Space Binary Drivers
-
 Package: libmali-valhall-g610-g6p0-gbm
 Architecture: arm64
 Provides: libmali
@@ -267,14 +251,6 @@ Replaces: libmali
 Depends: ${shlibs:Depends}, ${misc:Depends}
 Description: Mali GPU User-Space Binary Drivers
 
-Package: libmali-valhall-g610-g6p0-without-cl-dummy-gbm
-Architecture: arm64
-Provides: libmali
-Conflicts: libmali
-Replaces: libmali
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: Mali GPU User-Space Binary Drivers
-
 Package: libmali-valhall-g610-g6p0-x11
 Architecture: arm64
 Provides: libmali

debian/targets

@@ -15,11 +15,8 @@ aarch64-linux-gnu/libmali-midgard-t86x-r18p0-x11.so
 aarch64-linux-gnu/libmali-utgard-450-r7p0-gbm.so
 aarch64-linux-gnu/libmali-utgard-450-r7p0-wayland.so
 aarch64-linux-gnu/libmali-utgard-450-r7p0-x11.so
-aarch64-linux-gnu/libmali-valhall-g610-g6p0-dummy-gbm.so
-aarch64-linux-gnu/libmali-valhall-g610-g6p0-dummy.so
 aarch64-linux-gnu/libmali-valhall-g610-g6p0-gbm.so
 aarch64-linux-gnu/libmali-valhall-g610-g6p0-wayland.so
-aarch64-linux-gnu/libmali-valhall-g610-g6p0-without-cl-dummy-gbm.so
 aarch64-linux-gnu/libmali-valhall-g610-g6p0-x11.so
 arm-linux-gnueabihf/libmali-bifrost-g31-g2p0-gbm.so
 arm-linux-gnueabihf/libmali-bifrost-g31-g2p0-only-cl.so