dt-bindings: clock: qcom,mmcc-msm8998: drop core_bi_pll_test_se

The test clock apparently it's not used by anyone upstream. Remove it.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221228185237.3111988-6-dmitry.baryshkov@linaro.org

Documentation/devicetree/bindings/clock/qcom,mmcc.yaml

@@ -229,7 +229,6 @@ allOf:
             - description: HDMI phy PLL clock
             - description: DisplayPort phy PLL link clock
             - description: DisplayPort phy PLL vco clock
-            - description: Test clock
 
         clock-names:
           items:
@@ -242,7 +241,6 @@ allOf:
             - const: hdmipll
             - const: dplink
             - const: dpvco
-            - const: core_bi_pll_test_se
 
   - if:
       properties: