chore(web-modeler): remove unnecessary environment variables #1367

Job	Run time
Generate chart matrix	5s
Unit Test - Camunda 8.3 / Generate components matrix	5s
Unit Test - Camunda 8.2 / Generate components matrix	4s
Unit Test - Camunda 8.4 / Generate components matrix	3s
Validation - Camunda 8.2 / Lint	1m 7s
Validation - Camunda 8.3 / Lint	1m 28s
Validation - Camunda 8.4 / Lint	1m 8s
Unit Test - Camunda 8.4 / Core - Unit Test	4m 10s
Unit Test - Camunda 8.4 / Apps - Unit Test	3m 5s
Unit Test - Camunda 8.4 / Zeebe - Unit Test	2m 36s
Unit Test - Camunda 8.4 / WebModeler - Unit Test	3m 18s
Unit Test - Camunda 8.2 / Core - Unit Test	1m 50s
Unit Test - Camunda 8.2 / Apps - Unit Test	2m 32s
Unit Test - Camunda 8.2 / Zeebe - Unit Test	2m 2s
Unit Test - Camunda 8.2 / WebModeler - Unit Test	2m 44s
Unit Test - Camunda 8.3 / Core - Unit Test	2m 33s
Unit Test - Camunda 8.3 / Apps - Unit Test	3m 1s
Unit Test - Camunda 8.3 / Zeebe - Unit Test	2m 14s
Unit Test - Camunda 8.3 / WebModeler - Unit Test	3m 28s
Integration Test - Camunda 8.4 / Kubernetes 1.27 - Chart Setup	7m 14s
Integration Test - Camunda 8.3 / Kubernetes 1.27 - Chart Setup	7m 16s
Integration Test - Camunda 8.4 / Kubernetes 1.27 - Chart Upgrade	14m 16s
Integration Test - Camunda 8.3 / Kubernetes 1.27 - Chart Upgrade	20m 2s
Integration Test - Camunda 8.2 / Kubernetes 1.27 - Chart Setup	5m 19s
Integration Test - Camunda 8.2 / Kubernetes 1.27 - Chart Upgrade	8m 0s
	1h 39m 40s

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