Gantt chart tasks come with an undesired border - would prefer an option to disable it to satisfy client

[Matthematic]

Feature Request

Description

A client that is testing our app has complained of borders showing up between a list of rapid, short events that they created with an infusion pump. They expect these separate infusions to appear as one long bar, but the problem is that carbon adds a border somewhere that shows separation lines. We would be grateful if this border could be removed via a config option.

Graphs affected

• Bar graph
• Bubble graph
• Gantt chart
• Line graph
• Paired result
• Pie chart
• Scatter plot
• Timeline

Steps to Reproduce

1. Create a Gantt graph
2. Render a series of contiguous tasks with no gap between them
3. Observe borders

Link to CodeSandbox

https://codesandbox.io/s/cool-architecture-3yh3v?file=/src/data.js

Additional Context / Screenshots

Expected Behavior

We expect the borders to support an option to remove them so that they dont display

Possible Solution

Environment

• Component Name and Version:
• Browser Name and Version:
• Node/npm Version: [e.g. Node 8/npm 5]
• Webpack Version:
• Operating System and version (desktop or mobile):

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