remove now pointless macro for blas library

arpack.spec

@@ -83,11 +83,10 @@ cp -pr src src64
 
 
 %build
-%global blaslib -lflexiblas
 pushd src
 %configure --enable-shared --enable-static \
-    --with-blas="%{blaslib}" \
-    --with-lapack="%{blaslib}" \
+    --with-blas=-lflexiblas \
+    --with-lapack=-lflexiblas \
     --enable-icb
 %make_build
 popd
@@ -96,8 +95,8 @@ pushd src64
 %configure --enable-shared --enable-static \
     LIBSUFFIX=64 \
     INTERFACE64=1 \
-    --with-blas=%{blaslib}64 \
-    --with-lapack=%{blaslib}64 \
+    --with-blas=-lflexiblas64 \
+    --with-lapack=-lflexiblas64 \
     --enable-icb
 %make_build
 popd