AUTOUIC: Revert "Fix generating of dependency rules for UI header files"

Revert commit e5ec0e52f4 (AUTOUIC: Fix generating of dependency rules
for UI header files, 2021-07-22, v3.21.1~8^2) because it caused
regressions.  For example, changing one C++ source can now cause many
others to rebuild.  Revert the change pending further investigation.

Fixes: #22531
Issue: #16776

1 files changed, 0 insertions, 36 deletions

diff --git a/Source/cmQtAutoGen.cxx b/Source/cmQtAutoGen.cxx
index 898d862221..57fcd2da76 100644
--- a/Source/cmQtAutoGen.cxx
+++ b/Source/cmQtAutoGen.cxx
@@ -384,39 +384,3 @@ bool cmQtAutoGen::RccLister::list(std::string const& qrcFile,
   }
   return true;
 }
-
-bool cmQtAutoGen::FileRead(std::string& content, std::string const& filename,
-                           std::string* error)
-{
-  content.clear();
-  if (!cmSystemTools::FileExists(filename, true)) {
-    if (error != nullptr) {
-      *error = "Not a file.";
-    }
-    return false;
-  }
-
-  unsigned long const length = cmSystemTools::FileLength(filename);
-  cmsys::ifstream ifs(filename.c_str(), (std::ios::in | std::ios::binary));
-
-  // Use lambda to save destructor calls of ifs
-  return [&ifs, length, &content, error]() -> bool {
-    if (!ifs) {
-      if (error != nullptr) {
-        *error = "Opening the file for reading failed.";
-      }
-      return false;
-    }
-    content.reserve(length);
-    using IsIt = std::istreambuf_iterator<char>;
-    content.assign(IsIt{ ifs }, IsIt{});
-    if (!ifs) {
-      content.clear();
-      if (error != nullptr) {
-        *error = "Reading from the file failed.";
-      }
-      return false;
-    }
-    return true;
-  }();
-}