dt-bindings: clock: qcom,gcc-sdx55: 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/20221228185237.3111988-3-dmitry.baryshkov@linaro.org

Documentation/devicetree/bindings/clock/qcom,gcc-sdx55.yaml

@@ -24,15 +24,11 @@ properties:
     items:
       - description: Board XO source
       - description: Sleep clock source
-      - description: PLL test clock source (Optional clock)
-    minItems: 2
 
   clock-names:
     items:
       - const: bi_tcxo
       - const: sleep_clk
-      - const: core_bi_pll_test_se # Optional clock
-    minItems: 2
 
 required:
   - compatible
@@ -51,8 +47,9 @@ examples:
       compatible = "qcom,gcc-sdx55";
       reg = <0x00100000 0x1f0000>;
       clocks = <&rpmhcc RPMH_CXO_CLK>,
-               <&sleep_clk>, <&pll_test_clk>;
-      clock-names = "bi_tcxo", "sleep_clk", "core_bi_pll_test_se";
+               <&sleep_clk>;
+      clock-names = "bi_tcxo",
+                    "sleep_clk";
       #clock-cells = <1>;
       #reset-cells = <1>;
       #power-domain-cells = <1>;