remove specific experiments in queue (#2715)

* remove a special experiments in queue

* Update content/docs/command-reference/exp/remove.md

* Update content/docs/command-reference/exp/remove.md

* Add some example to it

* Recover it

* ref: remove remove --queue example from this PR

* Update content/docs/command-reference/exp/remove.md

* Update content/docs/command-reference/exp/remove.md

* ref: formate exp remove

Co-authored-by: Jorge Orpinel <[email protected]>

content/docs/command-reference/exp/remove.md

@@ -14,7 +14,8 @@ positional arguments:
 
 ## Description
 
-Deletes one or more experiments, indicated by name (see `dvc exp run`).
+Deletes one or more experiments, indicated by name (see `dvc exp run`) or ID
+(only queued experiments).
 
 With `--queue`, the list of experiments awaiting execution is cleared instead.
 
@@ -65,3 +66,31 @@ $ dvc exp list
 ```
 
 Nothing is listed after the last `dvc exp list` because they're all gone.
+
+The same applies to queued experiments but these won't have a name to give to
+`dvc exp remove` yet (unless you specified one). Alternatively, you can use
+their ID (shown when queued, and by `dvc exp show`). Let's queue a few
+experiments and then delete some of them:
+
+```dvc
+$ dvc exp run --queue -S train.min_split=64
+Queued experiment 'e41d5b4' for future execution.
+$ dvc exp run --queue -S train.min_split=32 --name split32
+Queued experiment '5751540' for future execution.
+$ dvc exp run --queue -S train.min_split=16 --name split16
+Queued experiment '8de9a6c' for future execution.
+
+$ dvc exp remove e41d5b4 split16
+
+$ dvc exp show --include-params=train.min_split --no-pager
+```
+
+```table
+┏━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┳━━━━━━━━┳━━━━━━━━━━┳━━━━━━━━━┳━━━━━━━━━━━━━━━━━┓
+┃ Experiment            ┃ Created      ┃ State  ┃ avg_prec ┃ roc_auc ┃ train.min_split ┃
+┡━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━╇━━━━━━━━╇━━━━━━━━━━╇━━━━━━━━━╇━━━━━━━━━━━━━━━━━┩
+│ workspace             │ -            │ -      │  0.57553 │ 0.94652 │ 2               │
+│ master                │ Aug 02, 2021 │ -      │  0.53252 │  0.9107 │ 2               │
+│ └── 5751540 [split32] │ 04:57 PM     │ Queued │        - │       - │ 32              │
+└───────────────────────┴──────────────┴────────┴──────────┴─────────┴─────────────────┘
+```