diff --git a/pio-tools/cxx_flags.py b/pio-tools/cxx_flags.py
deleted file mode 100644
index 74cf99e7c..000000000
--- a/pio-tools/cxx_flags.py
+++ /dev/null
@@ -1,4 +0,0 @@
-Import("env")
-
-# General options that are passed to the C++ compiler
-env.Append(CXXFLAGS=["-fpermissive"])
\ No newline at end of file