Builders.sh: remove spm fetch code

There is no need to fetch SPM binaries before execution because these
are fetched at runtime (and with the right version) by the
corresponding run configuration.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: Ica1b06eca3b6d8b16ba201526841a735cdbef453
1 file changed