Remove old vendored grpc files (#33762)

* Remove old vendored grpc artifacts

* string fix

Author: damccorm

buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy

@@ -2420,7 +2420,7 @@ class BeamModulePlugin implements Plugin<Project> {
           shadowClosure: GrpcVendoring_1_69_0.shadowClosure() << {
             // We perform all the code relocations but don't include
             // any of the actual dependencies since they will be supplied
-            // by org.apache.beam:beam-vendor-grpc-v1p60p1
+            // by org.apache.beam:beam-vendor-grpc-v1p69p0
             dependencies {
               include(dependency { return false })
             }

buildSrc/src/main/groovy/org/apache/beam/gradle/GrpcVendoring_1_60_1.groovy

@@ -315,7 +315,6 @@ include(":sdks:python:test-suites:tox:py312")
 include(":sdks:python:test-suites:xlang")
 include(":sdks:typescript")
 include(":sdks:typescript:container")
-include(":vendor:grpc-1_60_1")
 include(":vendor:grpc-1_69_0")
 include(":vendor:calcite-1_28_0")
 include(":vendor:guava-32_1_2-jre")