Trim down excelsior-gui's dependencies

- Remove glmark2 and many related dev header packages from the
requirements of excelsior-gui. They can always be installed separately,
if needed.

Change-Id: I2b86231bb766239f402de8d391df04f59063a0ec
diff --git a/debian/changelog b/debian/changelog
index 3bacf77..ad36758 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+meta-excelsior (2-5) mendel-eagle; urgency=medium
+
+  * Remove glmark2 dependency.
+
+ -- Coral Team <coral-support@google.com>  Thu, 03 Dec 2020 12:31:37 -0800
+
 meta-excelsior (2-4) mendel-eagle; urgency=medium
 
   * Remove explicit python3-edgetpu dependency.
diff --git a/debian/control b/debian/control
index c989ebf..5076db2 100644
--- a/debian/control
+++ b/debian/control
@@ -35,21 +35,7 @@
 Package: excelsior-gui
 Priority: optional
 Depends: excelsior-core,
-         glmark2,
-         libegl-mesa0,
-         libegl1-mesa-dev,
-         libgbm1,
-         libgbm-dev,
-         libgl1-mesa-dri,
-         libgl1-mesa-glx,
-         libgl1-mesa-dev,
-         libgles2-mesa-dev,
-         libosmesa6,
-         libwayland-egl1-mesa,
-         mesa-common-dev,
-         mesa-utils,
          mendel-gui,
-         wayland-protocols,
          weston-mtk,
          ${misc:Depends}
 Architecture: any