regulator: qcom_smd-regulator: Remove unused 'struct regulator_desc pmi8994_boost'

This was an upstreaming error.  Remove it as it's not to be used.

Fixes the following W=1 kernel build warning:

 drivers/regulator/qcom_smd-regulator.c:477:36: warning: ‘pmi8994_boost’ defined but not used [-Wunused-const-variable=]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: linux-arm-msm@vger.kernel.org
Link: https://lore.kernel.org/r/20200626065738.93412-10-lee.jones@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>