linting and removal of console.log

src/app/about/about.component.ts

src/app/sys-check/backend.service.ts

src/app/sys-check/network-check/tc-speed-chart.component.ts

src/app/sys-check/questionnaire/questionnaire.component.ts

src/app/sys-check/report/report.component.ts

src/app/sys-check/start.component.ts

src/app/sys-check/sys-check.component.ts

src/app/sys-check/sys-check.module.ts

src/app/sys-check/syscheck-data.service.ts

src/app/sys-check/unit-check/unit-check.component.ts