Remove unused field from QPA implementation

Silences a Clang++ warning/error:

> In file included from src/edf/qpa.cpp:12:
> include/edf/qpa.h:7:18: error: private field 'm' is not used [-Werror,-Wunused-private-field]
>     unsigned int m;
>                  ^
> 1 error generated.

1 files changed, 0 insertions, 3 deletions

diff --git a/native/include/edf/qpa.h b/native/include/edf/qpa.h
index 18123aa..bac460a 100644
--- a/native/include/edf/qpa.h
+++ b/native/include/edf/qpa.h
@@ -3,9 +3,6 @@
 
 class QPATest : public SchedulabilityTest
 {
- private:
-    unsigned int m;
-
  public:
     QPATest(unsigned int num_processors);