chore: remove default exports in the projects

[attilah]

Description of changes:

The PR prepares for enforcing the no-default-export TSLint rule, to reduce the possibility of making import errors which could happen easily and was present in the codebase.

Related links:

• https://palantir.github.io/tslint/rules/no-default-export/
• https://basarat.gitbooks.io/typescript/docs/tips/defaultIsBad.html

A PR will follow up to remove the default exports from the JS code as well.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-io]

Codecov Report

Merging #2537 into master will increase coverage by 0.32%.
The diff coverage is 81.66%.

@@            Coverage Diff             @@
##           master    #2537      +/-   ##
==========================================
+ Coverage   65.67%   65.99%   +0.32%     
==========================================
  Files         199      193       -6     
  Lines        9660     9604      -56     
  Branches     1966     1947      -19     
==========================================
- Hits         6344     6338       -6     
+ Misses       3042     2990      -52     
- Partials      274      276       +2

Impacted Files	Coverage Δ
packages/amplify-cli/src/context-extensions.ts	23.24% <ø> (ø)	⬆️
packages/amplify-cli/src/domain/input.ts	100% <ø> (ø)	⬆️
packages/amplify-cli/src/domain/constants.ts	100% <ø> (ø)	⬆️
...graphql-types-generator/src/typescript/language.ts	84.5% <ø> (ø)	⬆️
packages/amplify-graphql-docs-generator/src/cli.ts	0% <0%> (ø)	⬆️
.../graphql-transformer-core/src/util/amplifyUtils.ts	6.18% <10%> (ø)	⬆️
packages/amplify-cli/src/domain/context.ts	100% <100%> (ø)	⬆️
packages/amplify-cli/src/context-manager.ts	100% <100%> (ø)	⬆️
packages/graphql-auth-transformer/src/resources.ts	89.2% <100%> (ø)	⬆️
packages/amplify-cli/src/domain/plugin-platform.ts	100% <100%> (ø)	⬆️
... and 28 more

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[lgtm-com]

This pull request introduces 2 alerts and fixes 6 when merging 50ca191 into 7de3845 - view on LGTM.com

new alerts:

• 1 for Syntax error
• 1 for Unused variable, import, function or class

fixed alerts:

• 6 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 1 alert and fixes 6 when merging 19fa7ff into 7de3845 - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

fixed alerts:

• 6 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 1 alert and fixes 6 when merging 7e9e18a into e1de9ac - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

fixed alerts:

• 6 for Unused variable, import, function or class

[ammarkarachi]

Can we just delete all this commented out code?

[ammarkarachi]

There are some commented out files

[lgtm-com]

This pull request fixes 5 alerts when merging a476577 into a818558 - view on LGTM.com

fixed alerts:

• 5 for Unused variable, import, function or class

[github-actions]

This pull request has been automatically locked since there hasn't been any recent activity after it was closed. Please open a new issue for related bugs.

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