Remove obsolete RQt source installation instructions. (#4796)

These are no longer needed, since the RQt source installation
instructions are part of the "standard" development setup.

Usually I would consider making links for these, but given
how outdated these are, I'd rather just remove them completely.

Signed-off-by: Chris Lalancette <clalancette@gmail.com>

Author: clalancette

source/Concepts/Intermediate/About-RQt.rst

@@ -51,11 +51,6 @@ Installing From debs
    sudo apt install ros-{DISTRO}-rqt*
 
 
-Building From Source
-^^^^^^^^^^^^^^^^^^^^
-
-See :doc:`Building RQt from Source <../../How-To-Guides/RQt-Source-Install>`.
-
 RQt Components Structure
 ------------------------
 

source/How-To-Guides.rst

@@ -36,7 +36,6 @@ If you are new and looking to learn the ropes, start with the :doc:`Tutorials <T
    How-To-Guides/Cross-compilation
    How-To-Guides/Releasing/Releasing-a-Package
    How-To-Guides/Using-Python-Packages
-   How-To-Guides/RQt-Port-Plugin-Windows
    How-To-Guides/Run-2-nodes-in-single-or-separate-docker-containers
    How-To-Guides/Visualizing-ROS-2-Data-With-Foxglove-Studio
    How-To-Guides/Core-maintainer-guide
@@ -53,8 +52,3 @@ If you are new and looking to learn the ropes, start with the :doc:`Tutorials <T
    How-To-Guides/ROS-2-IDEs
    How-To-Guides/Setup-ROS-2-with-VSCode-and-Docker-Container
    How-To-Guides/Using-Custom-Rosdistro
-
-.. toctree::
-  :hidden:
-
-  How-To-Guides/RQt-Source-Install

source/How-To-Guides/Installation-Troubleshooting.rst

@@ -240,25 +240,6 @@ To resolve this error, you will need to:
 
    $ sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
 
-qt_gui_cpp error: SIP binding generator NOT available
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-.. only relevant to Eloquent and Foxy
-
-When building qt_gui_cpp there may be errors look like the following:
-
-.. code-block:: bash
-
-   --- stderr: qt_gui_cpp
-
-   CMake Error at src/CMakeLists.txt:10 (message):
-     No Python binding generator found.
-
-   ---
-   Failed   <<< qt_gui_cpp [ Exited with code 1 ]
-
-To fix this issue, follow :doc:`these steps <RQt-Source-Install-MacOS>` to install dependencies for RQt.
-
 rosdep install error ``homebrew: Failed to detect successful installation of [qt5]``
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 While following the :doc:`Creating a workspace <../Tutorials/Beginner-Client-Libraries/Creating-A-Workspace/Creating-A-Workspace>` tutorial, you might encounter the following error stating that ``rosdep`` failes to install Qt5.