Rewrote Element Query docs

docs/dev/element-queries/README.md

@@ -49,81 +49,6 @@ Each type of element has its own function for creating element queries, and they
 Most custom fields support element query parameters as well, named after the field handles.
 :::
 
-## Attribute Parameters
-
-Many parameters correspond to a particular element attribute. For example, entry queries have a `postDate` parameter that allows you to limit the results to entries with a matching _Post Date_.
-
-Attribute parameters generally support a variety of syntaxes:
-
-| Syntax | Find elements where the param’s attribute…
-| - | -
-| `param('X')` | is _X_.
-| `param('= X')` | is _X_.
-| `param('not X')` | is not _X_.
-| `param('!= X')` | is not _X_.
-| `param('<= X')` | is less than or equal to _X_.
-| `param('>= X')` | is greater than or equal to _X_.
-| `param('< X')` | is less than _X_.
-| `param('> X')` | is greater than _X_.
-| `param('*X*')` | contains _X_.
-| `param('not *X*')` | doesn’t contain _X_.
-| `param(':empty:)` | has no value.
-| `param(':notempty:')` | has any value.
-
-You can also specify multiple parameter values by setting the parameter to an array:
-
-| Syntax | Find elements where the param’s attribute…
-| - | -
-| `param(['X', 'Y']` | is either _X_ or _Y_.
-| `param(['or', 'X', 'Y'])` | is either _X_ or _Y_.
-| `param(['and', 'X', 'Y'])` | is both _X_ and _Y_.
-
-In these cases, _X_ and _Y_ can follow any of the supported parameter syntaxes.
-
-For example, let’s say you wanted to load entries that were posted sometime in the last month. 
-
-<code-toggle :languages="['twig', 'php']">
-<template slot="twig">
-
-```twig{7}
-{# Set the first and last dates that we want to fetch entries from #}
-{% set start = date('first day of last month')|atom %}
-{% set end = date('last day of last month')|atom %}
-
-{# Get all the entries that were posted between those dates #}
-{% set entries = craft.entries()
-    .postDate(['and', ">= #{start}", "<= #{end}"])
-    .all() %}
-```
-::: tip TWIG TIP
-We’re using [interpolation](https://twig.symfony.com/doc/2.x/templates.html#string-interpolation) to inject the `start` and `end` variables into the value strings, which felt a little cleaner than the `~` operator:
-
-```twig{2}
-{% set entries = craft.entries()
-    .postDate(['and', '>= '~start, '<= '~end])
-    .all() %}
-```
-:::
-
-</template>
-<template slot="php">
-
-```php{9}
-use craft\elements\Entry;
-
-// Set the first and last dates that we want to fetch entries from
-$start = new \DateTime('first day of next month')->format(\DateTime::ATOM);
-$end = new \DateTime('last day of next month')->format(\DateTime::ATOM);
-
-Get all the entries that were posted between those dates
-$entries = Entry::find()
-    ->postDate(['and', ">= {$start}", "<= {$end}"])
-    ->all();
-```
-
-</template>
-</code-toggle>
-
 ## Executing Element Queries
 
 Once you’ve defined your parameters on the query, there are multiple functions available to execute it, depending on what you need back.