Remove copy-pasted definition of PYTHON that wasn't used

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/programs/fuzz/Makefile b/programs/fuzz/Makefile
index fa17918..084fc24 100644
--- a/programs/fuzz/Makefile
+++ b/programs/fuzz/Makefile
@@ -20,8 +20,6 @@
 DLEXT ?= so
 EXEXT=
 SHARED_SUFFIX=
-# python2 for POSIX since FreeBSD has only python2 as default.
-PYTHON ?= python2
 
 # Zlib shared library extensions:
 ifdef ZLIB