cpu-features: Get rid of a superfluous initialization

The variable is already initialized to this value a few lines above.

This gets rid of warnings about dead initializations if analyzed
with clang static analyzer.

Change-Id: I2b5dafe133b16d26655d69878c019a17a41c417b
diff --git a/sources/android/cpufeatures/cpu-features.c b/sources/android/cpufeatures/cpu-features.c
index 119c2ac..4ca730d 100644
--- a/sources/android/cpufeatures/cpu-features.c
+++ b/sources/android/cpufeatures/cpu-features.c
@@ -195,7 +195,6 @@
 
     /* Look for first field occurence, and ensures it starts the line. */
     p = buffer;
-    bufend = buffer + buflen;
     for (;;) {
         p = memmem(p, bufend-p, field, fieldlen);
         if (p == NULL)