[libc][math] Build fail fix: obsolete header.

GitOrigin-RevId: 2a558b6bff5a03665081df0e153c53bff556036a
diff --git a/test/src/math/tanhf_test.cpp b/test/src/math/tanhf_test.cpp
index 86d883e..92d8522 100644
--- a/test/src/math/tanhf_test.cpp
+++ b/test/src/math/tanhf_test.cpp
@@ -6,7 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "src/__support/CPP/Array.h"
 #include "src/__support/FPUtil/FPBits.h"
 #include "src/math/tanhf.h"
 #include "utils/MPFRWrapper/MPFRUtils.h"