Remove redundant cmake dependencies (#3860)

var/spack/repos/builtin/packages/elemental/package.py

@@ -62,7 +62,6 @@ class Elemental(CMakePackage):
     variant('scalapack', default=False,
             description='Build with ScaLAPACK library')
 
-    depends_on('cmake', type='build')
     # Note that this forces us to use OpenBLAS until #1712 is fixed
     depends_on('blas', when='~openmp_blas ~int64_blas')
     # Hack to forward variant to openblas package