CMake: Disable switching between different readers

Remove the code that switches between different types of
readers based on what the different CMake binaries support.

This is no longer needed since only file-api is supported now.

Change-Id: Ia86d143f5e2cecc2bcd68ab7d62503915a32d223
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/cmakeprojectmanager/fileapireader.cpp

@@ -54,6 +54,8 @@ FileApiReader::FileApiReader() {}
 
 FileApiReader::~FileApiReader()
 {
+    if (isParsing())
+        emit errorOccurred(tr("Parsing has been canceled."));
     stop();
     resetData();
 }
@@ -74,15 +76,6 @@ void FileApiReader::setParameters(const BuildDirParameters &p)
         if (!m_isParsing)
             emit dirty();
     });
-
-    qCDebug(cmakeFileApiMode) << "FileApiReader: IS READY NOW SIGNAL";
-    emit isReadyNow();
-}
-
-bool FileApiReader::isCompatible(const BuildDirParameters &p)
-{
-    const CMakeTool *cmakeTool = p.cmakeTool();
-    return cmakeTool && cmakeTool->readerType() == CMakeTool::FileApi;
 }
 
 void FileApiReader::resetData()