Remove the fallback to 50% opacity when only useAcrylic is set (#11363)

This logic was seemingly redundant. There's two cases I'm looking at here:

#### Case 1
```jsonc
    "defaults":
    {
        "opacity": 35
    },
    "list":
    [
        {
            "commandline": "cmd.exe",
            "name": "Command Prompt"
        },
```

In this case, we wouldn't set the `TerminalSettings` Opacity to .35, we'd set it to 1.0, because the profile didn't have an `opactity`.

#### Case 2
```jsonc
    "defaults":
    {
        "useAcrylic": true
    },
    "list":
    [
        {
            "commandline": "cmd.exe",
            "name": "Command Prompt"
        },
```

In this case we still want to have an acrylic effect. Previously, we'd default this effect to 50% opaque. I'm not sure that we can actually get that anymore. BUT it turns out, we _can_ have 100% opacity and HostBackdropAcrylic. It is very subtle, but is maybe something we should be allowing anyways. It kinda looks like:
![image](https://user-images.githubusercontent.com/18356694/135168469-35d1f55b-58d1-4ee3-a717-76000c2574b9.png)



* [x] Fixes #11355
* [x] Regressed in #11180 
* [x] I work here
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Mike Griese 2021-09-29 05:26:20 -05:00 committed by GitHub
parent 6939112820
commit c0574f5ece
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@ -202,15 +202,7 @@ namespace winrt::Microsoft::Terminal::Settings::Model::implementation
_IntenseIsBold = WI_IsFlagSet(appearance.IntenseTextStyle(), Microsoft::Terminal::Settings::Model::IntenseStyle::Bold);
_IntenseIsBright = WI_IsFlagSet(appearance.IntenseTextStyle(), Microsoft::Terminal::Settings::Model::IntenseStyle::Bright);
// If the user set an opacity, then just use that. Otherwise, change the
// default value based off of whether useAcrylic was set or not. If they
// want acrylic, then default to 50%. Otherwise, default to 100% (fully
// opaque)
_Opacity = appearance.HasOpacity() ?
appearance.Opacity() :
UseAcrylic() ?
.5 :
1.0;
_Opacity = appearance.Opacity();
}
// Method Description: