Drop documentation build

We will add additional libraries back to the qt5.git. Having
documentation build enabled in additional library will cause problems
in qt5.git integrations so we need to drop it from module builds.

At same time drop the qttools dependency which were added for
documentation build

Task-number: QTBUG-91796
Change-Id: I260d20caf2367f97ab3fca00266dd9d5bc4cf447
Reviewed-by: Toni Saario <toni.saario@qt.io>
(cherry picked from commit 681cd61eb9)
Reviewed-by: Akseli Salovaara <akseli.salovaara@qt.io>

coin/module_config.yaml

@@ -6,9 +6,6 @@ accept_configuration:
 
 instructions:
   Build:
-    - type: EnvironmentVariable
-      variableName: BUILD_DOCUMENTATION
-      variableValue: "1"
     - !include "{{qt/qtbase}}/coin_module_build_template_v2.yaml"
 
   Test:

dependencies.yaml

@@ -8,6 +8,3 @@ dependencies:
   ../qtshadertools:
     ref: 1ec36cb67aabaca2799a4e96bd2dded6bb38f158
     required: true
-  ../qttools:
-    ref: d12847bb3d7fd147a1c44396b5b4ca7cbd53d86b
-    required: false