Closes #2126 unify_joined: Remove too extensive documentation (#2237)

* #2126 unify_joined: update arguments and tests of filter_joined() and derive_var_joined_exist_flag()

* #2126 unify_joined: update examples for derive_var_joined_exist_flag()

* #2126 unify_joined: documentation of filter_joined() and derive_var_joined_exist_flag()

* #2126 unify_joined: update derive_vars_joined()

* #2126 unify_joined: add get_joined_data(), update derive_extreme_event(), add tests

* #2126 unify_joined: update templates

* #2126 unify_joined: style files

* #2126 unify_joined: update vignettes

* #2126 unify_joined: update vignettes

* #2126 unify_joined: style files

* #2126 unify_joined: style files

* #2126 unify_joined: remove commented out code

* #2126 unify_joined: fix lintr issues

* #2126 unify_joined: add example for first_cond_lower

* #2126 unify_joined: update function documentation

* #2126 unify_joined: style files

* #2126 unify_joined: style files

* #2126 unify_joined: update NEWS.md

* #2126 unify_joined: improve documentation

* #2126 unify_joined: add example to event_joined()

* #2126 unify_joined: fix R-CMD check

* #2126 unify_joined: check class of deprecation warning

* #2126 unify_joined: improve documentation

* #2126 unify_joined: style files

* #2126 unify_joined: clean up globals.R

* #2126 unify_joined: improve documentation

* #2126 unify_joined: remove too extensive documentation

---------

Co-authored-by: Jerry Johnson <[email protected]>
Co-authored-by: Ben Straub <[email protected]>

R/derive_joined.R

@@ -581,29 +581,6 @@ derive_vars_joined <- function(dataset,
 #'   *Permitted Values*: list of expressions created by `exprs()`, e.g.,
 #'    `exprs(ADT, desc(AVAL))` or `NULL`
 #'
-#' @param new_vars Variables to add
-#'
-#'   The specified variables from the additional dataset are added to the output
-#'   dataset. Variables can be renamed by naming the element, i.e., `new_vars =
-#'   exprs(<new name> = <old name>)`.
-#'
-#'   For example `new_vars = exprs(var1, var2)` adds variables `var1` and `var2`
-#'   from `dataset_add` to the input dataset.
-#'
-#'   And `new_vars = exprs(var1, new_var2 = old_var2)` takes `var1` and
-#'   `old_var2` from `dataset_add` and adds them to the input dataset renaming
-#'   `old_var2` to `new_var2`.
-#'
-#'   Values of the added variables can be modified by specifying an expression.
-#'   For example, `new_vars = LASTRSP = exprs(str_to_upper(AVALC))` adds the
-#'   variable `LASTRSP` to the dataset and sets it to the upper case value of
-#'   `AVALC`.
-#'
-#'   If the argument is not specified or set to `NULL`, all variables from the
-#'   additional dataset (`dataset_add`) are added.
-#'
-#'   *Permitted Values*: list of variables or named expressions created by `exprs()`
-#'
 #' @param join_vars Variables to use from additional dataset
 #'
 #'   Any extra variables required from the additional dataset for `filter_join`
@@ -698,15 +675,6 @@ derive_vars_joined <- function(dataset,
 #'
 #'   *Permitted Values*: a condition
 #'
-#' @param mode Selection mode
-#'
-#'   Determines if the first or last observation is selected. If the `order`
-#'   argument is specified, `mode` must be non-null.
-#'
-#'   If the `order` argument is not specified, the `mode` argument is ignored.
-#'
-#'   *Permitted Values*: `"first"`, `"last"`, `NULL`
-#'
 #' @param check_type Check uniqueness?
 #'
 #'   If `"warning"` or `"error"` is specified, the specified message is issued