Remove exporter-jaeger from matrix

These tests were removed in 2a8d4ed,
but tox-factor just ignored the problem, but tox 4 fails because the env
does not exist.

Author: iurisilvio

.github/workflows/test.yml

@@ -43,9 +43,6 @@ jobs:
           - "getting-started"
           - "opentracing-shim"
           - "opencensus-shim"
-          - "exporter-jaeger-combined"
-          - "exporter-jaeger-proto-grpc"
-          - "exporter-jaeger-thrift"
           - "exporter-opencensus"
           - "exporter-otlp-proto-common"
           - "exporter-otlp-combined"