docs/devel: drop :hidden: and :includehidden: tags

This was confusing and in the case of qtest was hiding the details of
the qgraph sub-document in the qtest pages.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220419091020.3008144-4-alex.bennee@linaro.org>

docs/devel/index-api.rst

@@ -6,7 +6,6 @@ generated from in-code annotations to function prototypes.
 
 .. toctree::
    :maxdepth: 2
-   :includehidden:
 
    bitops
    loads-stores

docs/devel/index-build.rst

@@ -6,8 +6,7 @@ into our testing infrastructure. You will need to understand some of
 the basics if you are adding new files and targets to the build.
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 3
-   :includehidden:
 
    build-system
    kconfig

docs/devel/index-internals.rst

@@ -5,7 +5,6 @@ Details about QEMU's various subsystems including how to add features to them.
 
 .. toctree::
    :maxdepth: 2
-   :includehidden:
 
    qom
    atomics

docs/devel/index-process.rst

@@ -5,7 +5,6 @@ Notes about how to interact with the community and how and where to submit patch
 
 .. toctree::
    :maxdepth: 2
-   :includehidden:
 
    code-of-conduct
    conflict-resolution

docs/devel/index-tcg.rst

@@ -7,7 +7,6 @@ are only implementing things for HW accelerated hypervisors.
 
 .. toctree::
    :maxdepth: 2
-   :includehidden:
 
    tcg
    decodetree

docs/devel/index.rst

@@ -8,8 +8,6 @@ modifying QEMU's source code.
 
 .. toctree::
    :maxdepth: 1
-   :includehidden:
-
 
    index-process
    index-build

docs/devel/qtest.rst

@@ -3,7 +3,6 @@ QTest Device Emulation Testing Framework
 ========================================
 
 .. toctree::
-   :hidden:
 
    qgraph