chore: remove legacy generated samples

[eaball35]

Fixes #635

[snippet-bot]

Here is the summary of changes.

You are about to delete 21 region tags.

• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchAutocompleteJobTitle.java:32, tag job_search_autocomplete_job_title
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchBatchCreateJobs.java:34, tag job_search_batch_create_jobs
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchBatchDeleteJob.java:29, tag job_search_batch_delete_job
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchBatchUpdateJobs.java:34, tag job_search_batch_update_jobs
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchCommuteSearch.java:35, tag job_search_commute_search
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchCreateClientEvent.java:34, tag job_search_create_client_event
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchCreateCompany.java:30, tag job_search_create_company
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchCreateJob.java:32, tag job_search_create_job
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchCreateJobCustomAttributes.java:30, tag job_search_create_job_custom_attributes
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchCreateTenant.java:29, tag job_search_create_tenant
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchCustomRankingSearch.java:31, tag job_search_custom_ranking_search
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchDeleteCompany.java:29, tag job_search_delete_company
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchDeleteJob.java:29, tag job_search_delete_job
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchDeleteTenant.java:28, tag job_search_delete_tenant
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchGetCompany.java:30, tag job_search_get_company
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchGetJob.java:30, tag job_search_get_job
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchGetTenant.java:29, tag job_search_get_tenant
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchHistogramSearch.java:34, tag job_search_histogram_search
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchListCompanies.java:30, tag job_search_list_companies
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchListJobs.java:30, tag job_search_list_jobs
• samples/generated/src/main/java/com/google/cloud/examples/talent/v4beta1/JobSearchListTenants.java:29, tag job_search_list_tenants

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