chore: remove java 7 units check (#510)

This PR was generated using Autosynth. 🌈 Synth log will be available here: https://source.cloud.google.com/results/invocations/f647946a-1a60-44a8-80e4-5483535a0e7e/targets - [ ] To automatically regenerate this PR, check this box. (May take up to 24 hours.) Source-Link: googleapis/synthtool@1a2878d

Author: yoshi-automation

.github/workflows/ci.yaml

@@ -9,7 +9,7 @@ jobs:
  runs-on: ubuntu-latest
  strategy:
  matrix:
- java: [7, 8, 11]
+ java: [8, 11]
  steps:
  - uses: actions/checkout@v2
  - uses: actions/setup-java@v1

synth.metadata

@@ -4,7 +4,7 @@
  "git": {
  "name": ".",
  "remote": "https://github.com/googleapis/java-texttospeech.git",
- "sha": "7a8b9556524777a8dfc7558bd61ec3ecbbbc8c9c"
+ "sha": "0486daea6513ab07248231807d1db0816346a1d3"
  }
  },
  {
@@ -27,7 +27,7 @@
  "git": {
  "name": "synthtool",
  "remote": "https://github.com/googleapis/synthtool.git",
- "sha": "5d3c52f5db664eee9026db76b5bcb466f3a09ca9"
+ "sha": "1a2878d6909dd10ca4e3c1b5943d6622e996054e"
  }
  }
  ],