Remove unnecessary check

`QtDocs_FOUND` must be true, because we specify `REQUIRED` in the
`find_package()` call.

doc/CMakeLists.txt

@@ -5,17 +5,14 @@ include(FetchContent)
 FetchContent_Declare(FindQtDocs GIT_REPOSITORY "https://github.com/pcolby/cmake-modules" GIT_TAG "v1")
 FetchContent_MakeAvailable(FindQtDocs)
 list(PREPEND CMAKE_MODULE_PATH "${findqtdocs_SOURCE_DIR}")
-set(CMAKE_MESSAGE_LOG_LEVEL DEBUG)
 find_package(QtDocs REQUIRED COMPONENTS Core Bluetooth)
 
 # Include Qt doc tagfiles, if available.
-if (QtDocs_FOUND)
-  set(QT_DOCS_BASEURL "https://doc.qt.io/qt-${QT_VERSION_MAJOR}/")
-  message(STATUS "Using Qt doc tagfiles ${QT_INSTALL_DOCS} => ${QT_DOCS_BASEURL}")
-  set(DOX_TAGFILES "\\
+set(QT_DOCS_BASEURL "https://doc.qt.io/qt-${QT_VERSION_MAJOR}/")
+message(STATUS "Using Qt doc tagfiles ${QT_INSTALL_DOCS} => ${QT_DOCS_BASEURL}")
+set(DOX_TAGFILES "\\
   \"${QtDocs_Core_TAGS}=${QT_DOCS_BASEURL}\" \\
   \"${QtDocs_Bluetooth_TAGS}=${QT_DOCS_BASEURL}\" \\")
-endif()
 
 find_package(Doxygen)
 if (DOXYGEN_FOUND)